Speed-time graphs also show the following information:
- If the object is moving with a constant acceleration or deceleration
- The magnitude of the acceleration or deceleration
A straight line represents constant acceleration
The slope of the line represents the magnitude of acceleration
- A steep slope means large acceleration (or deceleration) - i.e. the object's speed changes very quickly
- A gentle slope means small acceleration (or deceleration) - i.e. the object's speed changes very gradually
- A flat line means the acceleration is zero - i.e. the object is moving with a constant speed

The distance travelled by an object can be found by determining the area beneath the graph

If the area beneath the graph forms a triangle (the object is accelerating or decelerating) then the area can be determined using the formula:

If the area beneath the graph is a rectangle (constant velocity) then the area can be determined using the formula:

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